Manufacture of board strengthened coverings



July 11, 1939. CHAMBQN 2,166,038

E OF BOARD STRENGTHENED GOVERINGS MANUFACTUR 7 Sheets-Sheet 1 Filed July15, 1936 July 11, 1939. H. CHAMBON MANUFACTURE OF BOARD STRENGTHENEDCOVER INGS Filed July 15, 1956 7 Sheets-Sheet 2 y 11, 1939- H. CHAMBON2,166,038

MANUFACTURE OF BOARD STRENGTHENED COVERINGS Filed July 15, 1936 '7Shets-Sheet 3 fig 5 25 Q 2: 23 1 g 2 r: 26 J9 f 20 12 T4 g; I L 16 y1939- H. CHAMBON MANUFACTURE OF BOARD STRENGTHENED COVERINGS Filed July15, 1936 7 Sheets-Sheet 4 July 11, 1939. H. CHAMBON MANUFACTURE OF BOARDSTRENGTHENED COVERINGS Filed July 15, 1936 7 Sheets-Sheet 5 y 1939- H.CHAMBON MANUFACTURE OF BOARD STRENGTHENED COVERINGS 7 Shets-Sheet 6Filed July 15, 1936 July 11, 1939. H. CHAMBON 2,166,033

MANUFACTURE OF BOARD STRENGTHENED COVERINGS Filed July 15, 1936 7Sheets-Sheet 7 Patented July 11, 1939 UNITED STATES MANUFACTURE OF BOARDSTRENGTHENED COVERINGS Henri Chambon, Paris, France, assignor to SocieteAnonyme des Anciens Etablissements L. Chambon, Paris, France ApplicationJuly 15, 1936, Serial No. 90,782 In France July 29, 1935 12 Claims.

This invention relates to processes and apparatus for the manufacture ofcoverings, comprising portions formed of board or similar material whichare secured to a support of flexible material such as paper.

One of the main features of the invention is to supplythe paper in theform of a strip which is cut towards the end of the process. Said stripis continuously advanced and is brought successively to the variousapparatuses which operate thereon without interfering with its feed. Inthis way the operations are very exactly performed and the tensionexerted upon the strip has a constant value, so that the length of thestrip between each apparatus is always identical and consequently theoperations such as the coating with adhesive, cutting or the like areexactly performed at the right place. I

In a preferred embodiment, the strip of paper is first cut by anoscillating cutting mechanism, then printed by a rotary printing machineand finally coated with adhesive and provided with board.

The position of the strips and particularly the position of the boardwill be advantageously adjusted by freely rotating cylinders arranged inangular relation to the direction of the strip. These are applied onsaid strip to urge it laterally against a fixed guide against which theedge of the strip bears. The strip will preferably pass successivelyunder a plurality of cylinders. The cylinders may be supported inbearings which are vertically slidable and which may rotate about avertical axis, and said bearings are adjustable in order to vary theangular setting of the cylinders.

The board may be fed preferably on the upper face of the strip which haspreviously been coated with adhesive and the board may be sectioned atthis time. It is advantageous to provide cylinders for driving the boardtogether with the paper and secure adhesiveness by pressing themtogether. Grooves may be provided on the surface of one of the cylindersin order to obtain feeding when desired. This feeding will preferablybegin a little before the cutting of the board.

The side edges of the paper may then be folded over by means of fixedfolders. The strip of paper may then be cut. Finally the transverseedges may be raised by depressing the blank in a folding box and thefolding overof such edges may be accomplished by means of a roller movedtoward the blank and controlled by a fixed cam.

In another embodiment, after being sectioned,

the blanks may fall upon a transfer device and are thus carried underthe folders and then between rollers which press the edges against theboards.

It is understood that the above arrangements and those which willfurther be described are jointly or separately considered as beingprotected by the present specification and claims.

By way of example and in order to facilitate an understanding of theinvention an embodiment thereof is shown in the accompanying drawings 10in which:

Figure l is an elevational view with parts in section of the right handside of a machine according to the invention.

Figure 2 is a similar view of the left hand side of the machine shown inFigure 1.

Figure 3 is a cross sectional view of the board aligning device.

Figure 4 is a plan view of the device 'shown in Figure 3. 29 Figure 5 isa cross sectional view on an enlarged scale of the board cuttingmechanism.

Figure 6 is a cross sectional view showing the cutting and foldingmechanism.

Figure '7 is a transverse cross sectional view of the folding device.

Figure 8 is a perspective view of the completed covering.

Figure 9 is a cross sectional view of the folding box on an enlargedscale. 39 Figure 10 is a diagrammatic plan view of the strip showing thesuccessive steps of its manufacture.

Figure 11 is an elevational view with parts in section of a somewhatmodified folding and securing device.

Figure 12 is a plan view of the device shown in Figure 11.

Figure 13 is an end view of the device shown in Figures 11 and 12.

Figure 14 is a perspective view of the covering with the edges upturnedat right angles.

The board strengthened covering to be manufactured is shown in Figure 14with its edges upturned at right angles in order to illustrate itsarrangement and Figure 8 shows it completed. The covering is formedoftwo rectangular pieces of heavy board I and 2, secured in side by sidespaced relationship on a sheet of paper having its overlapping edges 3,4, 5 and 6, folded over and secured to the board. In Figure 14 the edgesare shown upturned at right angles, whilst in Figure 8 they are foldeddown in their final position.

v The boards I and 2 are subsequently folded on one another, thusforming a book whose back or binding is constituted by the paper at i,in the spacing provided between both pieces of board.-

The machine used comprises a bed plate 8 supporting the various devices.Referring to Figure l, 9 is the reel of paper and I0 and ii, two reelsof board. The reels l0 and ii are slightly offset, so that the strips 12and H), which are being unrolled, will follow parallel paths, slightlyspaced the one from the other.

A number of aligning devices secure the correct positioning of bothstrips of board. They are diagrammatically shown at l4 and I5, in Figure1 and oneof them is more completely illustrated in Figures 3 and 4. Itcomprises a base it above which are supported two freely rotatablecylinders l4 and E5. The cylinders are provided at their ends withjournals i1 and I8, supported in the bearings i9 and Zli. The bearingsare vertically displaceable in the frames 2i and 22 and are urgeddownwardly by the springs 23 and M. The frames 2i and 22?, are arrangedin the supports 25 and 26, by means of pivots 2i and 28, which providefor the rotation of the frames about a vertical axis. v

The support 25 is fixed whilst the support it is longitudinally slidableunder the action of a screw 29. In this way the cylinders M and it 'maybe set with an obliquity such as shown in Figure 4 and said obliquesetting may be varied.

The strip of board if is guided between the base it and the cylinders Mand it which exert a light pressure against its surface due to theaction of the springs 23 and it. The strip it drives the cylinders l4and i5, and due to their obliquity the strip is urged against a fixedguide Ziii, shown at the left in Figures 3 and i. In this way, the rightposition of the board is secured, since its edge is always in contactwith the fixed guide 30. The other strip of board it, is guided in asimilar device which has not been shown.

On the other hand, the strip of paper it, fed from the reel 9, is guidedon the driving cylinders s2 and 33. Subsequently a cutting mechanism 3dpunches out triangular pieces in the edges of the strip and the strip isthus cut out as shown at in Figure 10. The said cutting mechanismcomprises an oscillating punching member 36, driven by an eccentric part311, in order to follow the motion of the strip 3!! during theoperation.

The strip is then fed to a printing device it for printing any suitablematter on the paper. Then it comes to an adhesive applying device itwhich coats with adhesive the upper face of the strip except an axialstripe 40 (Figure 10) and a narrower stripe H which joins the apexes ofthe triangles which have previously been cut.

Figure 10 shows at 42 and 43 two elements of the strip in this stage ofits manufacture. The axial stripe 40 will form the back or binding ofthe book, whilst the narrow stripes 4| indicate the places at which thestrip will be subsequently severed.

The strip of paper 3| then comes to the cutting mechanism whose frame isshown at 44 in Figure 2. On the other hand the strips of board l2 andI3, pass over the straightening blades 45 and 46 and subsequently cometo the cutting mechanism 44.

The said mechanism is of the oscillating type i. e., its cutter 41(Figures 2 and 5) is secured at the end of a connecting rod 48, whichunder the action of the eccentric 49, slides in a guide 50 oscillatableabout an axis 5|. Owing to such device, the cutter 41 and itscooperating element 52 interfered with.

The strip of paper 30 (Figure 5) is supplied aieaosa follow the stripduring each cutting operation, so that the constant speed of said stripis not horizontally and passes between two cylinders tit and 54. On theupper face of said strip 3|, which has been coated with adhesive, areapplied the strips'of board such as 55. Tl'ie strips move forward freelyduring the major part of the cutting operation and to this end, theupper T cylinder 53 is provided with recessed portions 56 and 51. Alittle before the end of the cutting operation, the nonrecessedperiphery of the cylinder 53 comes in front of the cylinder 54 andgrasps both paper and board. In this way the forward motion is securedwithout any traction resulting from any small diflerence in velocitybetween paper and board. Furthermore, under the action of pressure, theboard is secured to the paper and then the now composite strip takes theform shown at Maud 59, in Figure 10.

The strip is subsequently fed by the cylinders iii) and Bi which guideit under the fixed folding members 62. These members fold down thelongitudinal edges 3 and 5, upon the boards II and 2,

.as shown at 63 in Figure 10, thus obtaining the blanks shown at Gilland 65. A continuous strip is now obtained which is provided with piecesof board in spaced relation and with bordered longitudinal edges.

Such strip is then advanced to a cutting mechanism Mi similar to themechanism shown in Figure 5, i. e., of the oscillating type. Thismechanism cuts the strip of paper whilst following its constant forwardmotion. The strip is out along the narrow stripe which has not beencoated with adhesive and which is shown. at AM on the right hand side ofFigure 10.

After being cut, the blank i2 is supported on the pivoted angle memberst'i and 68,

(Figure 7) which support it until the piston 69 is moved downwardly. Atthis time the members El and bit, pivot away from the blank about theiraxes ill and l l, and the piston 89 forces the blank it down in afolding box. The transverse edges 4 and t, of the paper are then raisedat right angles by the lateral walls 713 and i i; of the folding box, asmay be seen in Figures 6 and 9 which show the successive positions ofthe same blank.

The folding down of the right edge 6 upon the board is obtained by amoving cylinder I5 (Figures 6 and 9). This cylinder is attached to theend of a lever arm 16 pivoted at W to a slide bar 118. The slide bar isprovided with a rack 19 (Figure 2) driven by a toothed sector 80, alever ti and a cam 82. The lever arm 06 is urged downwardly by a spring83, but its motion is controlled by a fixed track member 84 on which aroller of smaller diameter provided at the end of the cylinder rolls 15.The slide bar 18 is further provided at its left end with a stop' 85 andwith an extension 86 which forms a moving plate.

The track element 84 is formed with a lower central portion and with twolateral higher portions. In this way, when the slide bar 18 slides fromright to left, the cylinder 15 first moves away from the moving plate86, then approaches it and finally is once more spaced from the plate atthe end of its travel.

In this way the cylinder will fold down the edge 6 of the paper, thenpress it against the plate 86 and is finally moved away for returningbackwards. The cylinder thus performs the folding down and securing ofthe edge 8. Towards the end of said motion the stop meets the edge ofthe blank and urges it towards the left of Figure 6. Consequently, theblank comes out of the folding box through an aperture provided at thebase of the wall 13 and the edge 4 of the paper is thus folded down by ablade 81 and secured during its passage between the rollers 88 and 89.The said rollers feed the covering which is then completed and in theform shown at the left end of Figure 10. The covering is then fedbetween the teeth of a wheel 90 (Figure 2)which raises it vertically andstacks it in a box 9|.

In the embodiment of Figures 11, 12, and 13, the blanks are severed fromthe strip by the above described mechanism 66. They then fall upon anendless band 92 so that they travel in a direction at right angles tothe direction of the strip in a horizontal plane. The blanks are thuscarried between rollers such as 93 and 94, which feed them under thefixed inclined folders 95 and 96, shown in dot and dash lines in Figure12. The folders 95. fold down the edges of the blank, as previouslyexplained and such edges are adhesively secured during the travelbetween the rollers 91 and 98, which press the edges after theirfolding. Finally the completed coverings are piled at 99 on anotherconveyor Hill which travels slower than the first one.

Having now particularly described and ascertained the nature of myinvention and in what manner the same is to be performed, I declare thatwhat I claim is: 1. A machine for manufacturing cardboard covers from'strips of cardboard and paper comprising means for applying thecardboard upon a paper strip, means for cutting the cardboard intoseparated elements, said last named means being disposed before themeans for applying along the path followed by the cardboard at adistance less than the length of said cut-off elements in such mannerthat said cardboard element is applied at one of its ends upon the stripof paper while the other end is still connected to the strip ofcardboard, means for applying adhesive to the strip of paper located inadvance of the means for applying, and means for cutting said strip ofpaper covering said cardboard elements to predetermined lengths ofsheets.

2. A machine according to claim 1 in which said means for cutting saidcardboard comprises a cutting member and a guide for said member, saidcutting member being displaced parallel to said strip of cardboard andat substantially the same speed.

' 3. A machine as set forth in claiml in which said means for applyingthe cardboard elements upon the strip of paper comprises two cooperatingrollers and one of said rollers having notches therein.

4. A machine as set forth in claim 1 in which said means for cuttingsaid cardboard comprises a cutting member, a guide for said member, saidcutting member being displaced parallel to said strip of cardboard and.at substantially the same speed, and means for aligning said strip ofcardboard.

5. A machine as set forth in claim 1 in which said means for cuttingsaid cardboard comprises a cutting member, a guide for said member, saidcutting member being displaced parallel to said strip of cardboard andat substantially the same speed, and in which rollers are provided forfeeding the cardboard and the axes of said rollers are inclined to thelongitudinal axis of the cardboard strip. g

6. A machine as set forth in claim 1 in which said means for cuttingsaid cardboard comprises a cutting member, a guide for said member, saidcutting member displaced parallel to said strip of cardboard and atsubstantially the same speed and in which rollers are provided forfeeding the cardboard strip, the axes of said rollers being inclined tothe longitudinal axis of said cardboard strip, bearings for said rollersand pivoted elements supporting said bearing.

7. A machine as set forth in claim 1 in which said means for cuttingsaid cardboard comprises a cutting member, a guide for said member, saidcutting member displaced parallel to said strip of cardboard and atsubstantially the same speed and in which rollers are provided forfeeding said cardboard strips, the axes of said rollers being inclinedto the longitudinal axis of said cardboard strip, and lateral guidesagainst which said cardboard strip is pressed.

8. A machine as set forth in claim 1 in which means are provided forstraightening the cardboard strip and said straightening means islocated in advance of the cutting means.

9. A machine as set forth in claim 1 wherein fixed inclines are providedlocated at the sideof the paper strip after said means for applying butalong the trajectory oi.v the edges of said paper strip in order to foldsaid edges upon said cardboard elements.

10. A machine as set forth in claim 1 wherein fixed inclines areprovided located at the side of said paper strip after said means forapplying but along the trajectory of the edges of said paper strip inorder to fold said edges upon said cardboard elements, and means forfeeding said strip of paper located behind said fixed inclines.

11. A machine according to claim 1 in which said cutting means arelocated behind said means for applying, said cutting means comprising acutting member and a guide for said member, said cutting member beingdisplaced parallel to said cardboard strip and substantially at the samespeed as said cardboard strip.

' 12 A machine according to claim 1 in which a plurality of strips ofcardboard are provided and in which means are provided for maintainingsaid strips of cardboard in predetermined spaced relation.

HENRI CHAMBON.

